In loop styles (in which all yarn loops are uncut), yarn can be tufted in loops of even or varied heights. Level, even loop heights create a uniform surface, while varied heights create appealing designs.

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Loop carpets are ideal for rooms in which stylish design and texture are desired. Extremely durable and practical, loop carpets provide maximum durability for high-traffic areas with lots of activity. In addition, these styles are superior at maintaining long-term appearance, and they hide footprints well.

Cut-and-loop carpets in which uncut loops dominate are also excellent choices for active areas.

(Berber refers to a loop style using bulky yarns, usually with color flecks, and featuring a surface that can be level or have multiple levels. A good value, Berbers are often made from polypropylene—but nylon is also used.)

In general, the higher the twist level, the better the carpet’s performance.

(Frieze’ refers to a cut-pile carpet style with a very high twist level. Each yarn strand is twisted so tightly that, at its end, it curves back over itself in a kinked effect. The result is a durable product with a textured, nubby surface. Frieze’ carpets may be more costly because of higher production costs—lower twist products tend to cost less.)